摘要
NP23-P2002井为开发水平井,钻井目的为高效开发南堡2号构造潜山老堡南1断块油藏。该井目的层井底温度超过150℃,地层压力系数在0.99～1.01之间,稍有波动就会发生溢流或井漏,水平段施工,携砂是关键。该井五开使用密度为0.94～0.96 g/cm3的水包油钻井液。通过优选处理剂和调整油水比,确定了水包油钻井液配方。现场施工表明,该体系完全满足井下施工要求,顺利解决了抗温、携砂问题,整个施工过程采用欠平衡作业,欠压3～4 MPa,火焰高度一直保持在2 m以上,顺利实现了南堡油田的勘探开发目的。
As a horizontal well,NP23-P2002 is aimed at efficient development of one fault block oil reservoir of No.2 Nanpu structure buried hill reservoir.The bottom hole temperature of target stratum exceeds 150 ℃ and the formation pressure coefficient is between 0.99 to 1.01,well leakage or overflow occurs even with a slight fluctuation,so carrying sand is the key to horizontal section of the construction.0.94-0.96 g/cm3 density of the oil-in-water drilling fluid is used in this well.Through preferred treating-agent and oil-water ratio adjustment,the final formulation of the oil-in-water drilling fluid is determined.The site application shows that the system completely meets the requirements of underground construction,and the high temperature resistance and sand-carrying problems have been successfully resolved.Nanpu Oilfield exploration and development purposes are successfully achieved under the under-balanced operation,3-4 MPa under pressure,and remaining 2 m above the flame height.
出处
《钻井液与完井液》
CAS
2011年第4期36-39,94,共4页
Drilling Fluid & Completion Fluid
关键词
水包油钻井液
抗高温
欠平衡钻井
油层保护
南堡油田
Oil-in-water drilling fluid
High temperature resistance
Under-balanced drilling
Reservoir protection
Nanpu Oilfield
